# F(n)=F(n-1)+F(n-2)
def fib(n):
    if n <= 1:
        return n
    return fib(n - 1) + fib(n - 2)

if __name__ == "__main__":
    n = int(input("Enter a number: "))
    print(f"The {n}th Fibonacci number is: {fib(n)}")
